Not sure what to write about? Here are a few links that will help you select topics that can potentially drive bucket loads of traffic to your site:
http://buzz.yahoo.com/
http://technorati.com/pop/
http://www.google.com/press/zeitgeist.html
http://tools.wikimedia.de/~leon/stats/wikicharts/index.php?ns=articles&limit=100&wiki=enwiki
Be ...